1 /* SPDX-License-Identifier: (GPL-2.0 OR BSD-2- << 2 /* 1 /* 3 * This header provides constants for most GPI 2 * This header provides constants for most GPIO bindings. 4 * 3 * 5 * Most GPIO bindings include a flags cell as 4 * Most GPIO bindings include a flags cell as part of the GPIO specifier. 6 * In most cases, the format of the flags cell 5 * In most cases, the format of the flags cell uses the standard values 7 * defined in this header. 6 * defined in this header. 8 */ 7 */ 9 8 10 #ifndef _DT_BINDINGS_GPIO_GPIO_H 9 #ifndef _DT_BINDINGS_GPIO_GPIO_H 11 #define _DT_BINDINGS_GPIO_GPIO_H 10 #define _DT_BINDINGS_GPIO_GPIO_H 12 11 13 /* Bit 0 express polarity */ 12 /* Bit 0 express polarity */ 14 #define GPIO_ACTIVE_HIGH 0 13 #define GPIO_ACTIVE_HIGH 0 15 #define GPIO_ACTIVE_LOW 1 14 #define GPIO_ACTIVE_LOW 1 16 15 17 /* Bit 1 express single-endedness */ 16 /* Bit 1 express single-endedness */ 18 #define GPIO_PUSH_PULL 0 17 #define GPIO_PUSH_PULL 0 19 #define GPIO_SINGLE_ENDED 2 18 #define GPIO_SINGLE_ENDED 2 20 19 21 /* Bit 2 express Open drain or open source */ 20 /* Bit 2 express Open drain or open source */ 22 #define GPIO_LINE_OPEN_SOURCE 0 21 #define GPIO_LINE_OPEN_SOURCE 0 23 #define GPIO_LINE_OPEN_DRAIN 4 22 #define GPIO_LINE_OPEN_DRAIN 4 24 23 25 /* 24 /* 26 * Open Drain/Collector is the combination of 25 * Open Drain/Collector is the combination of single-ended open drain interface. 27 * Open Source/Emitter is the combination of s 26 * Open Source/Emitter is the combination of single-ended open source interface. 28 */ 27 */ 29 #define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | G 28 #define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_DRAIN) 30 #define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | 29 #define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_SOURCE) 31 << 32 /* Bit 3 express GPIO suspend/resume and reset << 33 #define GPIO_PERSISTENT 0 << 34 #define GPIO_TRANSITORY 8 << 35 << 36 /* Bit 4 express pull up */ << 37 #define GPIO_PULL_UP 16 << 38 << 39 /* Bit 5 express pull down */ << 40 #define GPIO_PULL_DOWN 32 << 41 << 42 /* Bit 6 express pull disable */ << 43 #define GPIO_PULL_DISABLE 64 << 44 30 45 #endif 31 #endif 46 32
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